XOMA Royalty Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

Royalty and Commercial Payment Purchase Agreements - Summary of Royalty Receivable Activities (Details)

Royalty and Commercial Payment Purchase Agreements - Summary of Royalty Receivable Activities (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2024	Dec. 31, 2024
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		$ 72,167
Acquisition of Royalty and Commercial Payment Receivables, Cost Recovery Method		45,000
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(18,938)
Recognition of Contingent Consideration, Cost Recovery Method		4,000
Credit Losses on Purchased Receivables, Cost Recovery Method		(30,904)
Reclassification of Royalty and Commercial Payment Receivables from the Cost Recovery to the EIR Method, Cost Recovery Method		(14,976)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		56,349
Contingent consideration under RPAs, AAAs, and CPPAs
Balance at Beginning of Period, Contingent consideration under RPAs, AAAs, and CPPAs		7,000
Recognition of Contingent Consideration		4,000
Payment of Contingent Consideration		(8,000)
Balance at End of Period, Contingent consideration under RPAs, AAAs, and CPPAs		3,000
Royalty and Commercial Payment Receivable Activities Under the EIR Method
Reclassification of Royalty and Commercial Payment Receivables from the Cost Recovery to the EIR Method, EIR Method		14,976
Income from Purchased Receivables Under the EIR Method		15,066
Receipt of Royalty and Commercial Payments, EIR Method		(10,309)
Balance at End of Period, Royalty and Commercial Payment Receivables, EIR Method		19,733
Income
Income from purchased receivables under the cost recovery method		3,201
Income from purchased receivables under the EIR method		15,066
Twist
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Acquisition of Royalty and Commercial Payment Receivables, Cost Recovery Method		15,000
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		15,000
Dare
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Acquisition of Royalty and Commercial Payment Receivables, Cost Recovery Method		22,000
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(1)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		21,999
Talphera
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Acquisition of Royalty and Commercial Payment Receivables, Cost Recovery Method		8,000
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(96)
Credit Losses on Purchased Receivables, Cost Recovery Method		(7,904)
LadRx
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		6,000
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(2,150)
Recognition of Contingent Consideration, Cost Recovery Method		1,000
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		4,850
Aptevo
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		7,976
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(795)
Reclassification of Royalty and Commercial Payment Receivables from the Cost Recovery to the EIR Method, Cost Recovery Method		(7,181)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method
Royalty and Commercial Payment Receivable Activities Under the EIR Method
Reclassification of Royalty and Commercial Payment Receivables from the Cost Recovery to the EIR Method, EIR Method	$ 7,200	7,181
Income from Purchased Receivables Under the EIR Method		266
Receipt of Royalty and Commercial Payments, EIR Method		(819)
Balance at End of Period, Royalty and Commercial Payment Receivables, EIR Method		6,628
Income
Income from purchased receivables under the EIR method		266
Agenus
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		14,000
Credit Losses on Purchased Receivables, Cost Recovery Method		(14,000)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method
Aronora
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		9,000
Credit Losses on Purchased Receivables, Cost Recovery Method		(9,000)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method
Palobiofarma
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		10,000
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		10,000
Viracta
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		8,500
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(8,500)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method
Income
Income from purchased receivables under the cost recovery method		3,201
Kuros
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		4,500
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		4,500
Affitech
Royalty and Commercial Payment Receivable Activities Under the Cost Recovery Method
Balance at Beginning of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method		12,191
Receipt of Royalty and Commercial Payments, Cost Recovery Method		(7,396)
Recognition of Contingent Consideration, Cost Recovery Method		3,000
Reclassification of Royalty and Commercial Payment Receivables from the Cost Recovery to the EIR Method, Cost Recovery Method		(7,795)
Balance at End of Period, Royalty and Commercial Payment Receivables, Cost Recovery Method
Royalty and Commercial Payment Receivable Activities Under the EIR Method
Reclassification of Royalty and Commercial Payment Receivables from the Cost Recovery to the EIR Method, EIR Method		7,795
Income from Purchased Receivables Under the EIR Method		14,800
Receipt of Royalty and Commercial Payments, EIR Method		(9,490)
Balance at End of Period, Royalty and Commercial Payment Receivables, EIR Method		13,105
Income
Income from purchased receivables under the EIR method		14,800
Contingent Consideration under ASC 450 \| LadRx
Contingent consideration under RPAs, AAAs, and CPPAs
Recognition of Contingent Consideration		1,000
Payment of Contingent Consideration		(1,000)
Contingent Consideration under ASC 450 \| Affitech
Contingent consideration under RPAs, AAAs, and CPPAs
Balance at Beginning of Period, Contingent consideration under RPAs, AAAs, and CPPAs		6,000
Recognition of Contingent Consideration		3,000
Payment of Contingent Consideration		(6,000)
Balance at End of Period, Contingent consideration under RPAs, AAAs, and CPPAs		3,000
Contingent Consideration under ASC 815 \| LadRx
Contingent consideration under RPAs, AAAs, and CPPAs
Balance at Beginning of Period, Contingent consideration under RPAs, AAAs, and CPPAs		1,000
Payment of Contingent Consideration		$ (1,000)
Balance at End of Period, Contingent consideration under RPAs, AAAs, and CPPAs